Coil and leaf spring arrangement for railway trucks



AVAILABLE {COPY c. L. ORR 2,225,793

COiL AND LEAF SPRING ARRANGEMENT FOR RAILWAY TRUCKS Dec. 24, 1940.

Filed Jan. 4, 1939 2 Sheets-Sheet 1 C. L. ORR

Dec. 24, 1940.

COIL AND LEAF SPRING ARRANGEMENT FOR RAILWAY TRUCKS Filed Jan. 4, 1939 2 Sheets-Sheet 2 MIWIHH M Patented Dec. 24, 1940 UNITED STATES- PATENT OFFICE COIL AND LEAF SPRING ARRANGEMENT FOR RAILWAY TRUCKS Claude L. Orr, Columbus, Ohio, assignor to The Buckeye Steel Castings Company, Columbus,

Ohio

Application January 4, 1939, Serial No. 249,308

13 Claims.

more particularly pointed out in the appendedclaims.

In the drawings: Fig. 1 is a vertical sectional view of a portion of a truck side frame and transverse bolster with my improvements incorporated therein, the section being taken on the line l-l of Fig. 2.

Fig. 2 is a top plan view with portions of the side frame broken away to facilitate illustration.

Fig. 3 is an end elevation. Referring to the drawings, 4 designates a side mg 5 for the reception of one end of a transverse bolster 6. The spring seat I at the top of the tension member of the side frame supports a spring seat brake hanger bracket casting 8 which supports a group of coil springs 9. The number and size of these springs is determined from the load to be supported, and may, therefore, vary. In this particular case, the load to be carried P and the space available requires the use of two large coils and twosmall coils.

The transverse bolster rests on top of the springs and carries the body load to the spring roup. As suflicient space isnot available between the bolster and the spring seat I for the 49 application of oneor more leaf springs, I so form the bolster as to receive and house such springs.

As illustrated, two leaf springs in are-used, spaced equal distances from the longitudinal center line of the end of the transverse bolster. Of course,

the size andvnumber of these springs is determined by the load to be carried and the space available.

The leaf springs operate within the end of the r bolster and they are supported on the spring seat casting 8 by means of a block H which is arranged in the group of coil springs and is provided at its upper end with posts or plungers II which extend through openings IS in the bottom of the transverse bolster. 'Upstanding lugs l4 6 provided on the spring seat casting serve to posito the latter.

frame member of a truck having a bolster opention the bottom or the block. Obviously the coil springs and block might rest directly on the .spring seat I if the casting 8 is omitted.

Arc-shaped bearing seats l5 and I6 are provided inside the transverse bolster and bear upon 5 the ends of the leaf springs for applying the load The seat l5 may be cast integral with the bolster while the seat I6 may be an integral part of a spring block I! which is secured to the end of the bolster by any suitable means 10 such as a bolt I8. The side walls of the bolster are extended as shown at 18a and provided with holes to receive the bolt.

When the leaf springs are loaded, an upward force at the left end bears against the seat I6 and is transferred to the bolster through the bolt and the extensions Ilia. The horizontal portion l9 at the top of the spring block prevents its rotating when subjected to, transverse loads due to track curvature, body roll, etc., and also relievesthe bolt from carrying the vertical load.

The upper surface of the bottom of the bolster is recessed as shown at 20 to receive the bottom portion ofspring bands 2| thereby positioning the leaf springs inside the bolster.

To apply the leaf springs 10,- the bolt l8 and block H are removed. This enables the outer ends of the springs III to be raised an amount .proper position. The leaf springs may be removed in a like manner. l

The use of a. coil and leaf spring ensemble is as desirable because the friction introduced into the group by the leaf spring or springs tends to dampen out the harmonic oscillations set up in the;coils at certain critical speeds. The travel of. ;.the coil and leaf springs is the same and equal to the group as a whole. The use of the leaf spring does not therefore introduce excessive travel.

Heretofore, it has been proposed to arrange a leaf spring consisting of short leaves, transversely in the end of the bolster, but they were not intended for main load carrying members, but only to assist the coils when they'are deflected to a near solid condition by heavy blows. In contradistinction, I-arrange the leaf springs longitudinally ofthe transverse bolster and the 50 parts are so combined that these springs constitute main load carrying members. I

While I have disclosed what I deem to be a preferred combination and arrangement of parts.

I do not wish to be limited thereto as there might 55 obviously be changes made in the form, construction and arrangement of the constituent elements as well as their modus operandi without departing from the spirit of the invention as comprehended within the scope of the appended claims.

What I claim and desire to secure by Letters Patent is: I

1. In a railway car truck, a side frame member having a bolster opening, a bolster having an end portion extending into said opening, coil springs circling the leaf spring and extending into said recess.

2. In a railway car truck, aside frame member having a bolster opening, a bolster having an end portion extending into said opening and provided with an opening in its bottom, coil springs supported by the side frame member and supporting the end of the bolster, a leaf spring supporting said bolster, said leaf spring being arranged within and longitudinally of said end portion of the bolster,'means for transferring a load placed on the leaf spring to the side frame member, the last-mentioned means comprising a block having an upstanding post extending through the opening in the bottom of the bolster and engaging the leaf spring.

3. In a railway car. truck, a side frame member having a bolster opening, a bolster having an end portion extending into said opening and provided with openings in the bottom thereof, a group of coil springs resting on the side frame member at. the bottom of the opening and supporting the end portion of the bolster, leaf springs arranged within the end portion of the bolster,

positioned longitudinally thereof and arranged at opposite sides of the longitudinal center thereof, and a block supported by the side frame member and having a plunger means extending through the openings in the bottom of the bolster and into engagement with one of said leaf springs.

4. In a railway car truck, a side frame member having a bolster opening, a bolster having an end portion extending into said opening and having openings in the bottom thereof, a group of coil springs arranged beneath the end portion of the bolster and supported by the side frame member, leaf springs arranged lengthwise of the end portion of the bolster and positioned within the same, and a block supported by the side frame member, arranged between the coil springs and having plungers extending through the openings in the bottomof the bolster and into engagement with the medial portion of the leaf springs, said end portion of the bolster resting on the end portions of the leaf springs.

5. In a railway car truck, a side frame member having a bolster opening with a tension member at the bottom thereof, a bolster having an end portion extending into said opening, spring medial portion of the leaf spring, whereby the latter forms a main load carrying member.

6. In a railway truck, a side frame member having a bolster opening with a tension member at the bottom thereof, a bolster having a box-shaped end portion extending into said opening, coil springs supported by the top of said tension member and on which the end of the bolster rests, a leaf spring having substantially horizontally disposed leaves arranged entirely within the bolster and lengthwise-thereof, said bolster having an opening in the bottom thereof, and means supported by the tension member of the side frame member, extending through the opening in the bottom of the bolster and 00- operating with the medial portion of the leaf spring whereby the latter forms a main loadcarrying member.

7. In a railway car truck of the type having a side frame provided with a bolster opening having a tension member at the bottom thereof, a bolster having an end portion extending into the opening and springs for supporting the bolster by the side frame, the improvements which comprise coil springs supported by the top of said tension member and on which the end of the bolster rests, a leaf spring having substantially horizontally disposed superposed leaves, arranged within the bolster and extending lengthwise thereof, the bolster resting on the end portions of the leaf spring, and means supported by the side frame and cooperating with the medial portion of the leaf spring whereby the latter form a main load-carrying member.

8. In a railway car truck of the type having a side frame provided with a bolster opening having a tension member at the bottom thereof, a bolster having an end portion extending into the opening and springs for supporting the bolster by the side frame, the improvements which comprise coil springs supported by the top of said tension member and on which the end of the bolster rests, a leaf spring having substantially horizontally disposed superposed leaves, arranged within the bolster and extending lengthwise thereof, the bolster resting on the end portions of the leaf spring, and means extending upwardly from the top of the tension member and engaging the medial portion of the leaf spring for transferring the load placed on the latter to the side frame member.

9. In a railwaycar truck of the type having a side frame provided with a bolster opening having a tension member at the bottom thereof, a bolster having an end portion extending into the opening and springs for supporting the bolster by the side frame, the improvements which comprise coil springs supported by the top of said tension member and on which the end of the bolster rests, a leaf spring'having substantially horizontally disposed superposed leaves, arranged within the bolster and extending lengthwise thereof, the bolster resting on the end portions of the leaf spring and having an opening in its bottom, and means extending upwardly from the top of the tension member and engaging the medial portion of the leaf spring for transferring the load placed on the latter to the side frame member, the last-mentioned means including a post extending loosely through the opening in the bottom of the bolster and into engagement with the bottom of the leaf spring.

10. In a railway car truck of the type having a side frame provided with a bolster opening having a tension member 'at the bottom thereof,

, a bolster having an end portion extending into the opening and springs for sup orting the bolster by the side frame, the improvements which comprise coil springs supported by the top of said tension member and on which the end of the bolster rests, a leaf spring having substantially horizontally disposed superposed leaves, arranged within the bolster and extending lengthwise thereof, the bolster resting on the end portions of the leaf spring, means supported by the side frame and cooperating-with the medial portion of, the leaf spring whereby the latter forms a main load-carrying member, and a member movably rconnected to the bolster and forming a bearing for an end portion of the leaf spring' to facilitate the introduction of the leaf spring into or re-" moval of the leaf spring from the bolster:

11. In a railway car truck of the type having a side frame provided with a bolster opening .having a tension memberatthe bottom thereof, a bolster having an end portion extending into the opening and springs for supporting the bolster bythe side frame, the improvements which comprise coil springs supported by the top of said tension member and 'on which the end of the bolster rests, a leaf spring having substantially horizontallydisposed superposed leaves, arranged within the bolster and extending lengthwise thereof, the bolster resting on the end portions of the leaf spring; means supported by .the side frame and cooperating with the medial portion of the leaf spring whereby the latter forms a main load-carrying member, and a removable spring blockarranged at an .end of the bolster and bearing against one end portion of the leaf spring, said block retaining the leaf spring when in place and permitting its introduction or removal when the block is removed 12. In a railway car truck of the type having a side frame provided with a bolster opening having a tension member at the bottom thereof, a

bolster having an end portion extending into the opening and springs for supporting the bolster by the side frame, the improvements which comprise coil springs supported by the top of said tension member and on whichthe end of the bolster irests, a leaf spring having substantially horizontally disposed superposed leaves, arranged within the bolster and extending lengthwise thereof, the bolster resting on the end portions of the leaf spring, means supported by the sidebolster having an end portion extending into the opening and springs for supporting the bolster by the side frame; the improvements which comprise coil springs supportedby the top of said tension member-and on which the end of the bolster rests, a leaf spring having substantially horizontally disposed superposed leaves, arranged within the bolster and extending lengthwise thereof, the bolster resting-on the end portions of the leaf spring, means supported by the side frame and cooperating with the medial portion of the leaf spring whereby the latter forms a main load-carrying member, the bolster bein provided with internal substantially arc-shaped load-carrying seats bearing against the ends of the leaf spring, oneof said seats being removable from the bolster to facilitate the introduction of the leaf spring into or its removal from th bolster.

' CLAUDE-L. ORR.- 

